Germany-based Deutsche Bahn subsidiary DB Netz has commissioned a Züblin and HOCHTIEF joint venture to build a rail tunnel in Rastatt, Germany.

The €312m tunnel construction project is part of the new railway route between Karlsruhe, Germany and Basel, Switzerland.

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"With this project, we will be building an important part of Deutsche Bahn’s main north-south railway route."

HOCHTIEF Infrastructure general manager Wilfried Rammler said: "With this project, we will be building an important part of Deutsche Bahn’s main north-south railway route."

The project’s main focus will be the twin-tube rail tunnel that will pass directly under Rastatt. This tunnel will be bored mechanically with a hydroshield tunnel boring machine over a length of approximately 3.8km.

Additional work under the contract covers the trough sections to the south and north, as well as a supply shaft and an operational building.

The joint venture will begin work on the project in November, which will be completed in mid-2018.